Author Topic: Opposed Piston Twin, D.Kelley  (Read 14154 times)

Offline Kim

  • Full Member
  • *****
  • Posts: 3072
  • Portland, Oregon, USA
Re: Opposed Piston Twin, D.Kelley
« Reply #135 on: September 03, 2018, 10:42:45 PM »
Hey Achim!  Great run!  And you've done a beautiful job on the engine (as always).  Sorry about the pin, I'm sure you'll get it sorted.
But it sure ran nice!
Kim

Offline Dave Otto

  • Full Member
  • *****
  • Posts: 3325
  • Boise, Idaho USA
    • Photo Bucket
Re: Opposed Piston Twin, D.Kelley
« Reply #136 on: September 03, 2018, 11:30:56 PM »
Hi Achim,
Congratulations on the first run!


Dave

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2168
  • Munich, Germany, EU
Re: Opposed Piston Twin, D.Kelley
« Reply #137 on: September 30, 2018, 03:51:43 PM »
Mike, Bob, Kim and Dave, thanks for following and the friendly words. It is always good to know, to have you around the globe and watching my attempts.


As already said some weeks ago, the small idler gears got some bronze bushes and bearing pins, made from SS now.
The starter starter driver got a heat treatment, hopefully with success, because the used steel is similar to the the US 12L14, which has a very low carbon content.
Kind Regards
Achim

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2168
  • Munich, Germany, EU
Re: Opposed Piston Twin, D.Kelley
« Reply #138 on: September 30, 2018, 03:55:11 PM »
.. also the set screws were changed, now used is the cup point version and fixed with Loctite now.
Next to do, cooling.
« Last Edit: September 30, 2018, 07:41:47 PM by fumopuc »
Kind Regards
Achim

Online Roger B

  • Full Member
  • *****
  • Posts: 3427
  • Switzerland
Re: Opposed Piston Twin, D.Kelley
« Reply #139 on: September 30, 2018, 04:32:21 PM »
That looks like it should stay together now  :ThumbsUp:  :ThumbsUp: I'm awaiting the next trials  :)  :wine1:
Best regards

Roger

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2168
  • Munich, Germany, EU
Re: Opposed Piston Twin, D.Kelley
« Reply #140 on: October 03, 2018, 03:56:00 PM »
That looks like it should stay together now  :ThumbsUp: :ThumbsUp: I'm awaiting the next trials  :) :wine1:


Hi Roger, I hope it will.


The cooling system is closed now.
Some epoxy glue to connect the parts.


Test run was sucessfully.


Kind Regards
Achim

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2168
  • Munich, Germany, EU
Re: Opposed Piston Twin, D.Kelley
« Reply #141 on: October 03, 2018, 04:06:58 PM »
Today was also the day of the first long runs.
Shortly interrupted by losing my exhaust pipes.
So it is clear now, it was no good idea to try soft soldering, also not with high temperature, 250░ C soft solder, it does not fit.
But at the end a good test day, I have burned some fuel also without the exhaust pipes.
A jig will be made soon, to do a hard soldering of the exhaust.
The little Chinese water pump does not work when the engine is running.
Perhaps the vibrations of the running engine are to much for it, because immediately after the engine stops running the flow is back.


 
« Last Edit: October 03, 2018, 07:20:44 PM by fumopuc »
Kind Regards
Achim

Offline Vixen

  • Full Member
  • ****
  • Posts: 901
  • Hampshire UK
Re: Opposed Piston Twin, D.Kelley
« Reply #142 on: October 03, 2018, 04:27:20 PM »
Hi Achim,

Congratulations on another successful run with this very interesting engine. You will soon have the bugs sorted out, I am sure.

Mike
It is the journey that matters, not the destination

Offline Ye-Ole Steam Dude

  • Full Member
  • ****
  • Posts: 824
  • Deep East Texas on Sam Rayburn Lake
    • Ye Ole Steam Dude
Re: Opposed Piston Twin, D.Kelley
« Reply #143 on: October 03, 2018, 05:18:22 PM »
Hello Achim,

It surely does sound good and very smooth. :ThumbsUp:

Have a great day,
Thomas

Online Roger B

  • Full Member
  • *****
  • Posts: 3427
  • Switzerland
Re: Opposed Piston Twin, D.Kelley
« Reply #144 on: October 03, 2018, 05:33:01 PM »
Hi Achim, the engine sounds good  :praise2:  :praise2: The water pump though is not so good. In the first video it doesn't sound stable, possibly cavitating  :headscratch: Did you reduce the voltage at the end because it seemed to slow down? The pump I am using on my petrol injection is running at 5V instead of the rated 12V.
Best regards

Roger

Offline fumopuc

  • Full Member
  • ****
  • Posts: 2168
  • Munich, Germany, EU
Re: Opposed Piston Twin, D.Kelley
« Reply #145 on: October 03, 2018, 07:38:03 PM »
Hi Achim, the engine sounds good  :praise2: :praise2: The water pump though is not so good. In the first video it doesn't sound stable, possibly cavitating  :headscratch: Did you reduce the voltage at the end because it seemed to slow down? The pump I am using on my petrol injection is running at 5V instead of the rated 12V.


Hi Roger, the slown down was caused by reducing the voltage from 12 to 9 Volt.
Kind Regards
Achim

Offline Admiral_dk

  • Full Member
  • ****
  • Posts: 973
  • S°ften - Denmark
Re: Opposed Piston Twin, D.Kelley
« Reply #146 on: October 03, 2018, 10:01:45 PM »
Hi Achim

Nice idle  :praise2:

Is the cooling pump running on the same power supply as the ignition ?
If so - are you sure it doesn't drop or have some really bad noise disturbing the pump (if it is a modern AC motor feed from an internal DC/AC IC) ?

Best wishes

Per

Online sco

  • Full Member
  • ****
  • Posts: 1499
  • Location: Northants UK
Re: Opposed Piston Twin, D.Kelley
« Reply #147 on: October 03, 2018, 10:02:07 PM »
Sweet running engine Achim!  8)

Simon
Ars longa, vita brevis.

Offline Dave Otto

  • Full Member
  • *****
  • Posts: 3325
  • Boise, Idaho USA
    • Photo Bucket
Re: Opposed Piston Twin, D.Kelley
« Reply #148 on: October 04, 2018, 12:00:06 AM »
Very nice Achim! You will work out the small bugs and it will be even more impressive!

Dave

Offline Art K

  • Full Member
  • ****
  • Posts: 873
  • Madison, Wisconsin USA
Re: Opposed Piston Twin, D.Kelley
« Reply #149 on: October 04, 2018, 12:09:14 PM »
Achim,
Sounds great! you'll get the problems all sorted out in no time.
Art